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Welcome to Grainger Motor Group
20 Locations across East Anglia and Hertfordshire – Mantles Group, Norton Way & EMG Motor Group
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Founded in 2022 by brothers Harry and Neal Grainger, Grainger Motor Group is the UK’s fastest-growing dealer group.
GMG consists of two highly respected automotive businesses: Mantles Group and EMG Motor Group. Together, the 20 locations are spread across leading vehicle franchises including Kia, Mazda, Honda, Nissan, MG, Omoda Jaecoo and BYD.
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Mantles Group represents Grainger Motor Group across Hertfordshire, centred around two well-known areas. Mantles Kia and BYD in Royston, plus 3 Norton Way dealerships (Honda, Nissan and Mazda) in Letchworth Garden City that have recently been acquired in 2026. Mantles has been in business for over 100 years, building up a reputation for its professionalism, transparency, and customer-first approach – leading to customers who keep coming back.
EMG Motor Group operates a large and established dealership network across the East Anglia, serving customers throughout Cambridgeshire, Bedfordshire, Suffolk, Norfolk, and beyond. With modern showrooms and expert local teams, EMG Motor Group has been providing customers with exceptional choice, knowledgeable advice, and a consistently high standard of service for over 50 years.
Our business is built on a simple but powerful commitment: to deliver an exceptional customer experience through knowledgeable, highly trained teams who care about our customers for life.
Whether you are searching for a new or used vehicle, we offer an extensive and diverse choice. We represent leading new car franchises including Kia, Mazda, BYD and MG, alongside a carefully selected stock of over 1,200 quality used vehicles, ensuring there is something to suit every lifestyle and budget.
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Our commitment extends far beyond the point of sale. At Grainger Motor Group, our experienced aftersales teams provide expert care throughout your ownership journey. From servicing and repairs to MOTs, all work is carried out by manufacturer-accredited technicians using the highest standards of workmanship. We also represent authorised repairer requirements across Ford, Nissan, Vauxhall, Mitsubishi and Hyundai brands. Grainger Motor Group — delivering trust, expertise and care for every mile ahead.
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Why buy from us?
Read more about how our group can help find your next car and the numerous reasons as to why you should trust us with the process.
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Award-Winning Performance
At Grainger Motor Group, our ambition is simple: to set the benchmark for automotive retail in the UK. We are proud to operate some of the country’s leading dealerships, recognised not only by our customers but by the industry itself.
Our commitment to excellence has been reflected in multiple prestigious awards, including:
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Kia Excellence Awards 2025
GMG claimed 5 of the 7 total awards at the Kia Excellence awards in 2025, including:
Dealer of the year
- 1st Place: EMG Motor Group Cambridge
- 2nd Place: Mantles Kia
- 3rd Place: EMG Motor Group Ely
Other Categories
- EV Dealer of the Year: EMG Motor Group Cambridge
- Aftersales Excellence Award: EMG Motor Group Ely
Kia Excellence Awards 2024
GMG claimed 6 of the 7 total awards at the Kia Excellence awards in 2024, including:
Dealer of the year
- 1st Place: Mantles Kia
- 2nd Place: EMG Motor Group Cambridge
- 3rd Place: EMG Motor Group Thetford
Mantles Kia also won
- EV Dealer of the Year
- Sales Excellence Award
- Customer Experience Award
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AM Awards 2025 & 2026
The awards evening took place every May with the aim to set the benchmark for achievement across the motor retail sector. GMG have taken home 8 awards in the last two years, including:
- 2025 Dealer Group of the Year
- 2025 & 2026 Used Car Performance of the Year
- 2025 Franchised Dealership of the Year (Mantles Kia)
- 2025 & 2026 EV Performance of the Year (2025 Mantles Kia & 2026 EMG Kia Cambridge)
- 2025 Retailer of the Year (Special Award)
- 2026 Workshop of the Year (Mantles Kia)
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Motor Trader Awards 2024 & 2025
Taking place at the Grosvenor House Hotel on London's iconic Park lane, the awards take place every November for a night of celebration, recognition and networking. Over the past two years, GMG have won:
- 2024 Customer Care Award - Mantles Kia
- 2024 Most Improved Dealership of the year – Mantles Kia
- 2025 Aftersales Excellence Award – Grainger Motor Group
- 2025 Franchised Dealership of the Year – Mantles KIA
- 2025 Most Improved Dealership of the Year – EMG KIA & Mazda Cambridge
- 2025 Used Car Dealer Group of the Year – Grainger Motor Group
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UK’s Best Workplaces™ 2026 by Great Place To Work®
Grainger Motor Group has been named one of the UK’s Best Workplaces™ 2026 by Great Place To Work®, ranking 79th in the large company category (201–1,000 employees) and standing as the only car dealership group in the top 100. The recognition is based on employee feedback, with 83% of staff saying it is a great place to work compared to 54% at a typical UK company.
Our ambition is to excel in everything we do, and we understand that our people are at the heart of that success. We are dedicated to fostering a supportive environment where our employees can develop and flourish. As our business evolves, we are committed to ensuring our team grows alongside it, achieving success together.
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Change Your Postcode
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![BYD King's Lynn (EMG)]()
BYD King's Lynn (EMG)King's Lynn, Norfolk, PE30 4NB
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![BYD Royston (Mantles)]()
BYD Royston (Mantles)Royston, Herts, SG8 5HJ
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![BYD Spalding (EMG)]()
BYD Spalding (EMG)Spalding, Lincolnshire, PE11 3DQ
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![Cambridge Mitsubishi]()
Cambridge MitsubishiDuxford, Cambridgeshire, CB22 4QQ
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![GMG Boston Used Cars & Mazda Aftersales]()
GMG Boston Used Cars & Mazda AftersalesBoston, Lincolnshire, PE21 8UJ
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![Haverhill Used Car Centre (EMG)]()
Haverhill Used Car Centre (EMG)Haverhill, Suffolk, CB9 0EP
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![Honda Letchworth (Norton Way)]()
Honda Letchworth (Norton Way)Letchworth Garden City, Hertfordshire, SG6 1BL
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![Huntingdon & Vauxhall Aftersales]()
Huntingdon & Vauxhall AftersalesHuntingdon, Cambridgeshire, PE29 6HQ
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Jaecoo Huntingdon
Huntingdon, Cambridgeshire, PE29 6HQ
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![Jaecoo Letchworth (Norton Way)]()
Jaecoo Letchworth (Norton Way)Letchworth Garden City, Hertfordshire, SG6 1BL
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![Kia Ely (EMG)]()
Kia Ely (EMG)Ely, Cambridgeshire, CB7 4DT
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![Kia Kings Lynn (EMG)]()
Kia Kings Lynn (EMG)King's Lynn, Norfolk, PE30 4NB
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![Kia Royston (Mantles)]()
Kia Royston (Mantles)Royston, Herts, SG8 5DQ
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![Kia South Cambridge (EMG)]()
Kia South Cambridge (EMG)Stapleford, Cambridgeshire, CB22 5DG
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![Kia Thetford (EMG)]()
Kia Thetford (EMG)Thetford, Norfolk, IP24 1HT
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![Mazda Cambridge (EMG)]()
Mazda Cambridge (EMG)Cambridge, Cambridgeshire, CB4 1SR
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![Mazda Letchworth (Norton Way)]()
Mazda Letchworth (Norton Way)Letchworth Garden City, Hertfordshire, SG6 1BL
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![MG Ipswich (EMG)]()
MG Ipswich (EMG)Ipswich, Suffolk, IP1 2DZ
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![Nissan Cambridge (EMG)]()
Nissan Cambridge (EMG)Duxford, Cambridgeshire, CB22 4QQ
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Nissan King's Lynn
King's Lynn, Norfolk, PE30 4NB
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![Nissan Letchworth (Norton Way)]()
Nissan Letchworth (Norton Way)Letchworth Garden City, Hertfordshire, SG6 1BL
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![Omoda Jaecoo Letchworth (Norton Way)]()
Omoda Jaecoo Letchworth (Norton Way)Letchworth Garden City, Hertfordshire, SG6 1BL
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Omoda Jaecoo Huntingdon (EMG)
Huntingdon, Cambridgeshire, PE29 6HQ
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![Spalding]()
SpaldingSpalding, Lincolnshire, PE11 3DQ
Grainger Motor Group Timeline
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Jun 2026UK’s Best Workplaces for Development 2026
Grainger Motor Group named one of the UK’s Best Workplaces for Development™ 2026. New for this year, the UK’s Best Workplaces for Development List recognises companies making employee development a key part of company culture.
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May 2026GMG Omoda Jaecoo Letchworth
Grainger Motor Group are proud to announce a Brand New Dealership to the group - GMG Omoda Jaecoo Letchworth. The dealership is situated in Letchworth on Norton Way North, alongside the Nissan, Honda and Mazda showrooms.
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May 2026AM Awards 2026
Grainger Motor Group wins three awards at the AM Awards 2026
"EV Performance of the Year” — EMG Cambridge Kia
“Workshop of the Year” — Mantles Kia
“Used Car Performance of the Year” — Grainger Motor Group´26 -
Mar 2026Dealership Updates
The EMG Huntingdon and Duxford showrooms welcome brand new franchises! EMG Omoda Jaecoo Huntingdon and EMG Nissan Cambridge (Duxford) open after major showroom refurbishments.
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Mar 2026Grainger Motor Group Awarded UK’s Best Workplaces™ Recognition!
Grainger Motor Group has been named one of the UK’s Best Workplaces™ 2026 by Great Place To Work®, ranking 79th in the large company category (201–1,000 employees) and standing as the only car dealership group in the top 100.
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Jan 2026Grainger Motor Group celebrate double win at BYD UK Retailer Awards
Grainger Motor Group won two prestigious awards at the first-ever BYD UK Retailer Awards, held at the Telford International Centre in Shropshire.
- Retailer Group of the Year
- Aftersales Retailer of the Year - EMG BYD Kings Lynn
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Jan 2026Grainger Motor Group triumph at Kia UK National Dealer Conference
Grainger Motor Group secured 5 out of the 8 top awards presented at the conference. Including:
- Dealer of the Year – 1st Place: EMG Cambridge
- Dealer of the Year – 2nd Place (Joint): EMG Ely
- Dealer of the Year – 2nd Place (Joint): Mantles Kia
- Aftersales Excellence Award: EMG Ely
- EV Excellence Award: EMG Cambridge
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Jan 2026GMG acquires Norton Way Nissan, Honda and Mazda
Grainger Motor Group acquiries 3 Norton Way dealerships in Letchworth - Nissan, Mazda and Honda. This transition marks a significant milestone in the GMG journey, which has grown the group to 19 total locations.
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Nov 2025Motor Trader Industry Awards 2025
Grainger Motor Group wins four awards at the Motor Trader Industry Awards 2025!
"Aftersales Excellence Award” — Grainger Motor Group
“Franchised Dealership of the Year” — Mantles Kia
“Most Improved Dealership of the Year” — EMG Kia & Mazda Cambridge
“Used Car Dealer Group of the Year” — Grainger Motor Group´25 -
Nov 2025Grainger Motor Group enters AM100
Grainger Motor Group enters AM100 listing achieving 76th place on the AM100, one of the fastest growing family businesses to achieve AM100 status.
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Nov 2025Kia PBV Centres Unveiled
EMG King’s Lynn and EMG Cambridge unveil newly developed Kia PBV centres. The upgraded sites introduce Kia’s newest range of electric vans to the region, offering dedicated facilities, specialist staff, and expanded services for business and fleet customers.
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Sep 2025EMG BYD Bury St Edmunds Opens
Grainger Motor Group opens BYD Bury St Edmunds in Suffolk. The site, formerly operating as a used-car dealership under EMG, is fully refurbished and rebranded, marking Grainger’s fourth BYD location and strengthening its partnership with the fast-growing EV manufacturer.
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Jun 2025Great Place To Work UK
Grainger Motor Group recognised as one of the UK’s Best Workplaces.
We are delighted that The 2025 UK’s Best Workplaces in Retail, Hospitality & Leisure™ list launched by Great Place To Work UK, has recognised Grainger Motor Group.
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May 2025AM Awards 2025
Grainger Motor Group takes home 5 awards at the AM AWARDS 2025
Dealer Group of the Year - Grainger Motor Group
Used Car Performance of the Year - Grainger Motor Group
Franchised Dealership of the Year - Mantles Kia
EV Performance of the Year - Mantles Kia
Special Award: Retailer of the Year - Grainger Motor Group
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Feb 2025Kia South Cambridge Opens
Grainger Motor Group opens 6th Kia dealership, Kia South Cambridge in Stapleford, Cambridgeshire.
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Jan 2025Grainger Motor Group wins 6 out of 7 Awards
Grainger Motor Group wins 6 out of 7 awards at the Kia Dealer Excellence Conference for their performance in 2024. This is something the Grainger’s are very proud of, considering the Kia dealer network is very strong and there over 180 dealers.
EV Dealer of the year
Sales Excellence Award
Customer Experience AwardDealer Excellence - Dealer of the year – Grainger Motor Group wins first, second and third place. With Mantles Kia achieving first place, EMG Cambridge achieving second place closely followed by EMG Thetford in third place.
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Jan 2025BYD Kings Lynn & BYD Spalding
GMG opens BYD King's Lynn in the former EMG Nissan site & in the same month BYD Spalding opens in a former EMG Used car dealership, growing the relationship with BYD to three locations.
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Nov 2024Mantles Kia Wins Motor Trader Awards
Mantles Kia wins Motor Trader Awards ‘Best Customer Care Dealership’ & ‘Most Improved Dealership of the year’.
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Nov 2024Mantles BYD Royston Opens
Grainger Motor Group opens its 1st BYD Dealership in former Mantles Kia Showroom in Royston.
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Oct 2024Mantles Kia New Showroom
Mantles Kia moves into its brand-new home next door on the Old North Road site. After significant investment the stunning new showroom opens with the latest Kia design, and benefits from a larger footprint and its own dedicated aftersales reception.in
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Jan 2024Grainger Motor Group Acquires EMG Anglia
Grainger Motor Group completes the acquisition of EMG Anglia Ltd from Nick Storey, EMG Holdings. EMG Anglia is a well-established business with 14 dealerships across East Anglia, representing Kia in Cambridge, Ely, Thetford and King’s Lynn, MG Ipswich, Mazda Boston & Cambridge and specialist Used car dealerships in Huntingdon, Haverhill, Duxford and Spalding. As part of this deal, Rent Direct, which offers car and van hire across East Anglia, was also included. This acquisition takes Grainger Motor Group to over 300 staff across 16 locations throughout Hertfordshire & East Anglia - making GMG one of the fastest growing family automotive dealer groups in the UK!
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Jan 2024Mantles Kia wins Kia Awards
Mantles Kia wins ‘European Kia Dealer of the year’ and finishes 2nd in the Kia dealer excellence awards for their performance in 2023
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Dec 2023Acquisition of EMG Used Cars in Royston
Grainger Motor Group adds it’s second site with the acquisition of EMG Used Cars in Royston. Mantles Group Ltd grows to two sites acquiring the site located next door, growing the footprint of our Royston site to 2.6acres.
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Jan 2023Grainger Motor Group acquires Mantles Group
Grainger Motor Group acquires Mantles Group Ltd, a 100-year-old family business, with a Kia dealership on York Way in Royston, Hertfordshire. The Mantles family had run the business for three generations, John Mantle and the Grainger’s share key values, underpinning the culture of a family run business, recognising our staff are the biggest asset to the business. These values and the succession of the business to continue under family ownership was a key reason John Mantle agreed to sell Mantles to Harry & Neal.
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Aug 2022Grainger Motor Group is Formed
Brothers Harry & Neal Grainger come together to form Grainger Motor Group. Having started out in the automotive industry aged 16 & 18 working in a family run dealer group for over 40 years. Neal & Harry joined Norton Way Motors as trainees working throughout all areas of the business, eventually helping to run the business as Operations Director & Finance Director.
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